Patent US6334871B1 successfully refreshed from Google Patents.
Patent DE419764C successfully refreshed from Google Patents.
DE419764C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Process for purifying gases
Assignee: BERNHARD CHRISTOFFELS
•
Filing: 1924-01-10
•
Granted: 1925-10-14
•
Expires: 1944-01-10
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-11-06 13:40
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/30; B01D46/32
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.